I was looking for that picture of the guts of the stock
cooler in the Racing Beat catalog and came across this tidbit.
Mazda competition department sells a "Factory Race Engine 
Oil Cooler well suited to the rotary".
The dimensions are 22.5 by 6.5 by 2 inches thick.

Racing Beat also sells an oil cooler 11.5 wide by 12.6 high by 2 inches
thick oil cooler if you prefer that form factor.
Check the ACRE NL web site below for Racing Beat's web address.

Paul Lamar
 
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